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Old 12-27-2007, 08:53 PM   #1
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Gasoline shelf life

How do you know for sure that the gas your buying is good? Since I'm boosted and drive my car in the winter, I'm worried that when I purchase 93 octane, am I actually getting 93 octane and if it's good gas. I don't want to blow my motor cause of bad gas, so how do I know for sure that it's good? Think about it, with the price of gas these days, I doubt if alot of people are buying 93 octane gas, which means it's probably been at the gas station for a long time. Is there a shelf life on gas and do the gas stations check to make sure the gas is good? What can I do to make sure I don't harm my motor?


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Old 12-27-2007, 08:55 PM   #2
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well all mercedes are supposed to run premium, so just go to those kinds of gas stations LOL
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Old 12-27-2007, 09:41 PM   #3
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i think if you go to any respectable gas station it should be fine.....go to a busy station and it will be good.
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Old 12-27-2007, 09:42 PM   #4
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plus if you're that worried, get some octane booster
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Old 12-27-2007, 09:46 PM   #5
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I worked for a convenient store in college a couple years ago. They had a smaller tank for the 93 octane gas.....

besides, the small town (2,000 people polpulation, 500 cows, and 200 chickens), it would only take about 2 weeks for the store to sell "one tank" worth ( i think the 87 and 91 octane had 10,000 gallon tanks. and the 93 octane was 5,000 gal tank).

I doubt you are getting "old" bad gas due to the gas sitting in the tank at the gas station, unless it was leaking/contaminated.

you could always ask a local gas station when they get gas deliveries, and then fill up later that day with newer fresh supply. for us it was every sunday and thursday between 10am and noon.
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Old 12-27-2007, 10:29 PM   #6
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saytins right,,most stations dont carry no where near the amount of premium gas as they do the 86 or 87 octane,,plus gas which usually is just an 89 octane and the biggest waste of money per gallon for the actual octane you get,,plus is normally a 70/30 mix in general of reg and prem.and most gasoline by the time it actually hits a gas station has been around for at least 23 days to 2 months.so when it was labeled 93 that was at it freshest point,,so when you actually get it in the car,and usually its from evaporation process of certain elements,, you might be getting a 91 to 93.but in all actuallity the yellow sticker on the pump with the octane number if you notice uses the R+M2 rating which is an average between the research octane numbers and the motor octane numbers,,,so your not getting an actual motor rated octane where the fuel is actually placed under pressure and engine heat for a true octane rating (and i think vp racing fuels is still the only company that has an actual true rating on there fuels because they use the mon rating) so your not getting a true 93 mon octane to start with.
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Old 01-01-2008, 10:31 AM   #7
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I must have gotten some bad gas from my local BP station cause the car was running like crap. Check the plugs, wires and etc, and then after getting gas at Sheetz, car runs fine again.
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Old 01-01-2008, 10:33 AM   #8
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I should clarify, it wasn't really running like crap, just sounded like it had a little knock on low RPM acceleration.
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Old 01-01-2008, 01:09 PM   #9
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So how long of a shelf life does gasoline have? Cuz if it's just gasoline texture breaksdown over like 2-3 or 4 month's time, then some people pretty much been driving with bad gas most of the time.....(that last part sounded weird in a different perspective. sorry. lol)
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Old 01-01-2008, 01:50 PM   #10
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So how long of a shelf life does gasoline have? Cuz if it's just gasoline texture breaksdown over like 2-3 or 4 month's time, then some people pretty much been driving with bad gas most of the time.....(that last part sounded weird in a different perspective. sorry. lol)
Gas 'shelf life' is in years. More than likely you filled from a low tank and got some water with it. Stations are supposed to 'stick' there tanks regularly with water finder to insure that there not so low as to pump that crud. If its really bad get some water finder (its a green paste) and 'stick' you tank. If it comes up red then you will know.
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